Ever since Ubuntu 11.10, it has seemingly been impossible to hide Rhythmbox and have it display just a tray icon. Instead, when lowering it, it is still shown in my Window List down the bottom of my screen, which is needlessly taking up space.

In the past, when closing the Rhythmbox window, it would disappear from the screen completely, and just show a tray icon in the top right hand corner of my screen, which I could use to show/hide it.

I'm using Ubuntu 12.04 now, and it has exactly the same problem with this as it did in 11.10. I'm using the Gnome Classic desktop. Rhythmbox is displayed in the sound section of the indicator-applet, but I can't see any way to get it to hide completely.

Is there any way to replicate the old pre-11.10 behavior where it would display only a tray icon and nothing else?

I was on a similar hunt and ended up using this tray icon plugin, which stays visible after closing the Rhythmbox window. It seems like a recent behavioral change but I can't find a way to toggle the behavior of the X.